Oxidation behavior of amorphous metallic Ni{sub 3}(SbTe{sub 3}){sub 2} compound
- Department of Applied Chemistry, Konkuk University, Choongju 380-701 (Korea, Republic of)
- Department of Chemistry, Kangnung National University, Kangnung 210-702 (Korea, Republic of)
- Department of Chemistry, Yonsei University, Seoul 120-749 (Korea, Republic of)
- Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148 (United States)
Amorphous Ni{sub 3}(SbTe{sub 3}){sub 2} compound was prepared from a metathesis between Zintl phase K{sub 3}SbTe{sub 3} and NiBr{sub 2} in solution and its oxidation behavior was investigated in the temperature range of 200-700 deg. C in air. To characterize the sample, thermogravimetry (TG), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive analysis by X-ray (EDAX) analyses were performed and electrical conductivity was measured as a function of temperature in the range of 25-800 deg. C in air. The specimen showed a metallic conducting-like behavior below 585 deg. C while a semiconducting-like behavior above 585 deg. C. At a first oxidation step of Ni{sub 3}(SbTe{sub 3}){sub 2} below 500 deg. C, TeO{sub 2} phase is formed. Above 500 deg. C, NiO phase is formed, then some NiO reacts with TeO{sub 2} to form NiTeO{sub 3} and NiSb{sub 2}O{sub 6} is simultaneously formed. Above 700 deg. C, NiTeO{sub 3} is further reacted with TeO{sub 2} to form NiTe{sub 2}O{sub 5}. Both NiTeO{sub 3} and NiTe{sub 2}O{sub 5} are decomposed above 774 deg. C.
- OSTI ID:
- 20891647
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 3; Other Information: DOI: 10.1016/j.materresbull.2005.09.003; PII: S0025-5408(05)00342-9; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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